土中爆炸冲击混凝土道面的数值模拟  

Numerical Simulation of Explosion in Soil and Concrete Plate

作　　者：马荷梅[1] 张若京[1] 

机构地区：[1]同济大学,航空航天与力学学院,上海200092

出　　处：《力学季刊》2005年第3期428-432,共5页Chinese Quarterly of Mechanics

基　　金：第二炮兵第四研究所"爆炸对机场道面结构的破坏研究"项目

摘　　要：炸药在多相介质中的爆炸是气态爆轰产物和固态介质之间的耦合作用问题,对其进行数值模拟一般不考虑炸药而直接将爆轰压力加在介质上,而耦合方法对炸药和其周围的介质进行离散,炸药和介质采用统一的控制方程,通过界面条件实现相互作用。任意拉格朗日欧拉(ArbitaryLagrangianandEularian)法,是最近兴起的适用于计算固体大变形问题的数值计算方法。将其引入爆炸力学计算,可以避免由于物质的大变形引起的单元畸变和计算困难。同时混凝土的损伤模型,更加符合混凝土在高应变率加载条件下的力学特性和破坏机理。将这三种方法引入数值模拟,计算结果与相关试验结果有较好的吻合。The explosion in multi-materials is a prohlem concerning the couple of explosion and media, whereas most simulations of it ignored the effect of media to the explosion. The coupled method considers their couple through uniform governing equations and the interface conditions. Arbitary Lagrangian-Eularian method was developed particularly for calculating the large deformation problems, for the meshing abnormality can be avoided. Also, the new developed Holmquist-Johnson-Cook＇s model of concrete is more accordant with the property and fracture mechanism of concrete under impact and explosion loading. By the conbination of the three above methods, the calculating result well consists with the experimental data.

关 键 词：数值模拟 混凝土损伤模型 爆轰 任意拉格朗日欧拉 

分 类 号：TH113.1[机械工程—机械设计及理论]